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Equity - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2023 | Jun. 30, 2023 | Dec. 31, 2022
Equity [Abstract] |  |  |
Available-for-sale securities |  | $ 9 | $ 9
Foreign currency translation adjustment | $ 1 | 6 |
Actuarial gain related to pensions and other postretirement benefits | $ (7) | (7) |
AOCI attributable to equity method investments |  | 16 | 13
Accumulated other comprehensive income |  | $ 24 | $ 16

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